1968
January January; 82 (1): 1 - 198	February February; 82 (2): 203 - 425	March March; 82 (3): 429 - 641
April April; 82 (4): 651 - 884	May May; 82 (5): 889 - 1071	June June; 82 (6): 145 - 1248
July July; 83 (1): 1 - 185	August August; 83 (2): 199 - 398	September September; 83 (3): 405 - 635
October October; 83 (4): 645 - 910	November November; 83 (5): 917 - 1148	December December; 83 (6): 1155 - 1389